Meaning of “mm” in the English Dictionary

"mm" in American English

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mmnoun [ C ]

plural mm

abbreviation for millimeter

(Definition of “mm” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"MM" in Business English

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uk us

STOCK MARKET written abbreviation for market-maker :

Are the MM net buyers or net sellers?

mmnoun [ C ]

uk us plural mm

MEASURES written abbreviation for millimetre (= a unit of length equal to 0.001 metres):

It measures 119 mm in length by 63 mm in width by 13 mm deep.

(Definition of “MM” from the Cambridge Business English Dictionary © Cambridge University Press)